This is a cd produced by ID with extra levels
for Doom 2. Some of them are quite good, with adequate architecture and
weapon/monster placement. Others are, well, garbage. Still it's a must-have
for every Doom fan. The CD contains twenty WAD files created by various
authors under contract. The file teeth.wad contains a secret level, so
there are a total of 21 levels. As a bonus, a poster and 1830 amateur
PWAD files downloaded from the internet (collectively called Maximum Doom)
are also included (191 for Doom, 1629 for Doom II and 10 for Heretic).
Also of note is that some of the contracted designers
for the 21 Master Levels had levels they had previously released on the
internet that were included in Maximum Doom.